P型背接式網印太陽能電池｜國立清華大學博碩士論文庫

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研究生：	辛璧宇 Hsin, Pi-Yu
論文名稱：	P型背接式網印太陽能電池 Screen-printed Interdigitated Back Contact Solar Cells on Cz P-type Wafer
指導教授：	甘炯耀 Gan, Jon-Yiew
口試委員:	黃金花 Huang, Jin-Hua 黃振昌 Hwang, Jenn-Chang 黃文瑞 Huang, Wen-Rui 顏光甫 Yen, Kuang-Fu
學位類別：	博士 Doctor
系所名稱：	工學院 - 材料科學工程學系 Materials Science and Engineering
論文出版年：	2018
畢業學年度：	106
語文別：	英文
論文頁數：	73
中文關鍵詞：	背接式、網印、P型、矽晶太陽能電池
外文關鍵詞：	IBC, screen printed, P-type, silicon solar cell
相關次數：	點閱：1 下載：0
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背接式太陽能電池效率比傳統矽晶太陽能電池高上不少，但其製造成本複雜又昂貴，使其無法成為市場主流。在本研究中，我們使用目前市場上技術成熟且大量使用成本又較低廉的絲網印刷及Cz-P型矽晶片，進行指叉背接型太陽能電池（IBC）的製造和特性分析。此實驗製造出來的太陽能電池為10平方公分，轉換效率為20.08％，其中，開路電壓為645mV，短路電流密度40.15 mA / cm2，填充因子77.51％。此外，電池性能也通過基於所測量的電學性質的分析計算而得到驗證。從我們的分析計算的結果看來，採用適當的射極設計，絲網印刷的p-Si指叉背接型太陽能電池能達到680mV的開路電壓和22％的轉換效率。在本實驗中，背面接觸鈍化（PERC）電池可以獲得與絲網印刷的IBC電池相當的效率，IBC電池可以藉由改善背面的射極的飽和電流來提升效率，PERC電池也可以有相同的效果只要前表面射極的改進不影響電池的光吸收。

In this study, we report on the fabrication and analytical characterization of the screen-printed p-Si interdigitated back contact (IBC) cells with the conversion efficiency of 20.08%, with open-circuit voltage of 645 mV, short-circuit current density of 40.15 mA/cm2, and fill factor of 77.51%. The cell performance has also been confirmed with the analytical calculation based on the electrical properties measured. It also shows that, with the proper emitter design, the open-circuit voltage of 680 mV and conversion efficiency of 22% is possibly attainable for the screen-printed p-Si IBC cell. Compared with the screen-printed IBC cells, the passivated emitter and rear “contact” (PERC) cell may perform equivalently well, provided that any improvement on Seff of the front surface does not compromise the light absorption and emitter resistance of the cell.

Table of Contents    iv
List of Figures    vi
List of Tables    ix
Chapter 1    Introduction    1
1 Motivation    1
2 Outlines    3
Chapter 2    Literature reviews    5
1 Generation and recombination    5
1.1 Generation    5
1.2 Recombination mechanisms and lifetime    6
1.3 Effective lifetime    14
2 Silicon solar cells    14
2.1 Working principle    14
2.2 IV curve and efficiency    17
2.3 Short-circuit current    18
2.4 Open-circuit voltage    20
2.5 Fill factor    22
3 Review of back contact solar cells    23
3.1 Metallization wrap through solar cells (MWT)    24
3.2 Emitter wrap through solar cells (EWT)    24
3.3 Interdigitated back contact solar cells (IBC)    25
Chapter 3    Measurements    30
1 Minority carrier lifetime measurement from photoconductance decay    30
2 Quasi-steady state photoconductance decay    32
3 Saturation current from WCT-120    34
4 Lifetime measurement of ALD Al2O3 on BSF surface    35
Chapter 4    Experiments    38
1 Cell design and test    38
2 Cell fabrication and structure    41
3 Cell performance and effective surface recombination    45
Chapter 5    Analysis    50
1 Analysis of Voc    50
2 Analysis of Jsc    52
2.1 Non-uniform generation rate and absorption    57
3 Analysis of FF    60
Chapter 6    Conclusions    68
References    70


                                

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